It can't be set directly because table cells expand in height based on their content.
Setting min-height is easy. It can be done thorugh JSON format or attr() method.
{ dataIndx, value1, ... pq_rowattr: { style: 'min-height:50px;' } }
attr({
rowData, rowData,
attr: { style: 'min-height:50px;' }
})
max-height can be set by wrapping the cell contents in a div and setting max-height on that div. It can be done at once in columnTemplate or individual columns.
columnTemplate: {render: function(ui){
var rowData = ui.rowData;
//set max-height based on rowData or a fixed value.
return "<div style='max-height:50px;overflow:auto;'>"+ui.cellData +"</div>";
}},